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Finding the Fourth Proportional to 25,129.60, 37,629.60 and 19,945.60

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Solution

The fourth proportional to 25,129.60, 37,629.60 and 19,945.60 is: 29,866.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,129.60 : 37,629.60 = 19,945.60 : x
  2. Step 2: Convert to fraction form
    25,129.60/37,629.60 = 19,945.60/x
  3. Step 3: Cross multiply
    25,129.60x = 37,629.60 × 19,945.60
  4. Step 4: Simplify right side
    25,129.60x = 750,544,949.76
  5. Step 5: Solve for x
    x = 750,544,949.76/25,129.60
  6. Step 6: Final answer
    x = 29,866.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.